I got a chance to use a public restroom near Portland, OR which was
lit up by two arrays each with 10 LED's. These seemed to be the same
brightness as my biking "headlamp" which has 3 diodes running on
2xAAA batteries. The light was dimmer, harsher and cast sharper
shadows - admittedly, I would not want to work under such light.
In my bachelor days I had a 1000W metal halide bulb in my living room
which produced very pleasing light (and ~200cm tomato plants in
february) - are these produced in smaller denominations to use for
regular lighting ? I've seen 150W varieties out there - are these
practical for use in labs?
Maciej Simm
On Aug 20, 2007, at 2:27 AM, Simon Hunt wrote:
> .yes, they do (~12 mg Hg per standard tube, at least):
>> "...Approximately 370 pounds of mercury were released in California
> in the year
> 2000 due to the breakage of electric lamps and tubes during storage
> and
> transportation. It is estimated that nearly 75 million waste
> fluorescent lamps
> and tubes are generated annually in California. These lamps and
> tubes contain
> more than a half a ton of mercury. The mercury in urban storm water
> sediment
> results in part from improperly discarded fluorescent lamps and
> tubes..."
> (source: http://www.ciwmb.ca.gov/WPIE/FluoresLamps/ )
>> "Every year 80 million fluorescent lights are sent to landfill
> sites in the UK -
> despite the fact that each lamp contains enough mercury to pollute
> 30,000 litres
> of water beyond a safe level for drinking. [In 2001] some 5% of
> discarded tubes
> in the UK are estimated to be recycled." (source:
>http://www.wasteonline.org.uk/resources/Wasteguide/> mn_wastetypes_lighting.html )
>> Lara Krebs (recent post) has got it right. It's time to move to
> 21st century
> multispectral LED lighting, when we've got the chance.
>> Simon Hunt
>> In message <D4AC669A123D60459579E8CD6BE5207B858192 at vchexmb5.vch.ca>
> "Dalal,
> Bakul [Dr.][VA]" <Bakul.Dalal at vch.ca> writes:
>> Is that true?
>>>> Fluorescent bulbs do not have mercury, to the best of my knowledge.
>>>>>> Bakul
>>>> -----Original Message-----
>> From: Andrew Beernink [mailto:Andrew.Beernink at dako.com]
>> Sent: Wednesday, August 15, 2007 2:08 PM
>> To: cyto-inbox
>> Subject: RE: Flow Cytometry Facility Room Lighting
>>>>>> Don't forget the significant issue of mercury disposal, as all
>> fluorescent bulbs (to my knowledge) have measurable amounts of
>> mercury.
>>>> Andrew Beernink
>> Senior Applications Specialist
>> Dako Colorado
>> (858) 353-7007
>> (858) 435-1137 efax
>> ..
> --
> Dr Simon V. Hunt, Lecturer in Immunology, Dunn School of Pathology
> Fellow and Tutor in Immunology, Keble College, Oxford University
>>